Intro to Millwright Practice Exam 2025 – Comprehensive All-In-One Guide for Exam Success!

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What is a thread file used for?

Cutting new threads

Cleaning slightly damaged threads

A thread file is specifically designed to clean and repair slightly damaged threads. This tool features multiple ridges that correspond to different thread sizes and pitches, allowing it to be used effectively on various threaded objects. When threads become dirty or are slightly worn due to wear and tear, using a thread file helps restore their function, ensuring that nuts and bolts can fit together securely and operate safely.

The other options do not accurately describe the purpose of a thread file. For instance, while cutting new threads requires tools such as taps or dies, and measuring thread pitch is performed with specialized gauges, neither of these tasks falls under the scope of a thread file's use. Tapping holes involves creating internal threads and is accomplished with a tap, not a thread file. Therefore, a thread file is most accurately defined by its ability to maintain the integrity of existing threads.

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Measuring thread pitch

Tapping holes

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